Greyed out Temperature Limit on MSI Afterburner

I want the GPU to underclock when temp hits a certain value to avoid exceeding it. I'm gaming on a Aorus X7 v7 DT laptop with a 1080 GTX. I installed MSI Afterburner, the option was greyed out. I edited the MSIAfterburner.cfg in both the root directory and profiles, same issue. What next?